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llvm-project/llvm/test/CodeGen/WebAssembly/cfg-stackify-eh.ll

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; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -disable-block-placement -verify-machineinstrs -fast-isel=false -machine-sink-split-probability-threshold=0 -cgp-freq-ratio-to-skip-merge=1000 -exception-model=wasm -mattr=+exception-handling | FileCheck %s
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown"
@_ZTIi = external constant i8*
@_ZTId = external constant i8*
; Simple test case with two catch clauses
; CHECK-LABEL: test0
; CHECK: call foo@FUNCTION
; CHECK: .LBB0_1:
; CHECK: i32.catch
; CHECK: i32.call $drop=, _Unwind_CallPersonality@FUNCTION
; CHECK: i32.call $drop=, __cxa_begin_catch@FUNCTION
; CHECK: call bar@FUNCTION
; CHECK: call __cxa_end_catch@FUNCTION
; CHECK: .LBB0_3:
; CHECK: i32.call $drop=, __cxa_begin_catch@FUNCTION
; CHECK: call __cxa_end_catch@FUNCTION
; CHECK: .LBB0_5:
; CHECK: call __cxa_rethrow@FUNCTION
; CHECK: .LBB0_6:
; CHECK: return
define void @test0() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
entry:
invoke void @foo()
to label %try.cont unwind label %catch.dispatch
catch.dispatch: ; preds = %entry
%0 = catchswitch within none [label %catch.start] unwind to caller
catch.start: ; preds = %catch.dispatch
%1 = catchpad within %0 [i8* bitcast (i8** @_ZTIi to i8*), i8* bitcast (i8** @_ZTId to i8*)]
%2 = call i8* @llvm.wasm.get.exception(token %1)
%3 = call i32 @llvm.wasm.get.ehselector(token %1)
%4 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
%matches = icmp eq i32 %3, %4
br i1 %matches, label %catch2, label %catch.fallthrough
catch2: ; preds = %catch.start
%5 = call i8* @__cxa_begin_catch(i8* %2) [ "funclet"(token %1) ]
%6 = bitcast i8* %5 to i32*
%7 = load i32, i32* %6, align 4
call void @bar() [ "funclet"(token %1) ]
call void @__cxa_end_catch() [ "funclet"(token %1) ]
catchret from %1 to label %try.cont
catch.fallthrough: ; preds = %catch.start
%8 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTId to i8*))
%matches1 = icmp eq i32 %3, %8
br i1 %matches1, label %catch, label %rethrow
catch: ; preds = %catch.fallthrough
%9 = call i8* @__cxa_begin_catch(i8* %2) [ "funclet"(token %1) ]
%10 = bitcast i8* %9 to double*
%11 = load double, double* %10, align 8
call void @__cxa_end_catch() [ "funclet"(token %1) ]
catchret from %1 to label %try.cont
rethrow: ; preds = %catch.fallthrough
call void @__cxa_rethrow() [ "funclet"(token %1) ]
unreachable
try.cont: ; preds = %entry, %catch, %catch2
ret void
}
; Nested try-catches within a catch
; CHECK-LABEL: test1
; CHECK: call foo@FUNCTION
; CHECK: .LBB1_1:
; CHECK: i32.catch $0=, 0
; CHECK: i32.call $drop=, _Unwind_CallPersonality@FUNCTION, $0
; CHECK: i32.call $drop=, __cxa_begin_catch@FUNCTION, $0
; CHECK: call foo@FUNCTION
; CHECK: .LBB1_3:
; CHECK: i32.catch $0=, 0
; CHECK: i32.call $drop=, _Unwind_CallPersonality@FUNCTION, $0
; CHECK: i32.call $drop=, __cxa_begin_catch@FUNCTION, $0
; CHECK: call foo@FUNCTION
; CHECK: .LBB1_5:
; CHECK: catch_all
; CHECK: call __cxa_end_catch@FUNCTION
; CHECK: rethrow
; CHECK: .LBB1_6:
; CHECK: call __cxa_rethrow@FUNCTION
; CHECK: rethrow
; CHECK: .LBB1_7:
; CHECK: call __cxa_end_catch@FUNCTION
; CHECK: .LBB1_8:
; CHECK: catch_all
; CHECK: call __cxa_end_catch@FUNCTION
; CHECK: .LBB1_9:
; CHECK: call __cxa_rethrow@FUNCTION
; CHECK: rethrow
; CHECK: .LBB1_10:
; CHECK: call __cxa_end_catch@FUNCTION
; CHECK: .LBB1_11:
; CHECK: return
define hidden void @test1() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
entry:
invoke void @foo()
to label %try.cont11 unwind label %catch.dispatch
catch.dispatch: ; preds = %entry
%0 = catchswitch within none [label %catch.start] unwind to caller
catch.start: ; preds = %catch.dispatch
%1 = catchpad within %0 [i8* bitcast (i8** @_ZTIi to i8*)]
%2 = call i8* @llvm.wasm.get.exception(token %1)
%3 = call i32 @llvm.wasm.get.ehselector(token %1)
%4 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
%matches = icmp eq i32 %3, %4
br i1 %matches, label %catch, label %rethrow
catch: ; preds = %catch.start
%5 = call i8* @__cxa_begin_catch(i8* %2) [ "funclet"(token %1) ]
%6 = bitcast i8* %5 to i32*
%7 = load i32, i32* %6, align 4
invoke void @foo() [ "funclet"(token %1) ]
to label %try.cont unwind label %catch.dispatch2
catch.dispatch2: ; preds = %catch
%8 = catchswitch within %1 [label %catch.start3] unwind label %ehcleanup9
catch.start3: ; preds = %catch.dispatch2
%9 = catchpad within %8 [i8* bitcast (i8** @_ZTIi to i8*)]
%10 = call i8* @llvm.wasm.get.exception(token %9)
%11 = call i32 @llvm.wasm.get.ehselector(token %9)
%12 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
%matches4 = icmp eq i32 %11, %12
br i1 %matches4, label %catch6, label %rethrow5
catch6: ; preds = %catch.start3
%13 = call i8* @__cxa_begin_catch(i8* %10) [ "funclet"(token %9) ]
%14 = bitcast i8* %13 to i32*
%15 = load i32, i32* %14, align 4
invoke void @foo() [ "funclet"(token %9) ]
to label %invoke.cont8 unwind label %ehcleanup
invoke.cont8: ; preds = %catch6
call void @__cxa_end_catch() [ "funclet"(token %9) ]
catchret from %9 to label %try.cont
rethrow5: ; preds = %catch.start3
invoke void @__cxa_rethrow() [ "funclet"(token %9) ]
to label %unreachable unwind label %ehcleanup9
try.cont: ; preds = %catch, %invoke.cont8
call void @__cxa_end_catch() [ "funclet"(token %1) ]
catchret from %1 to label %try.cont11
rethrow: ; preds = %catch.start
call void @__cxa_rethrow() [ "funclet"(token %1) ]
unreachable
try.cont11: ; preds = %entry, %try.cont
ret void
ehcleanup: ; preds = %catch6
%16 = cleanuppad within %9 []
call void @__cxa_end_catch() [ "funclet"(token %16) ]
cleanupret from %16 unwind label %ehcleanup9
ehcleanup9: ; preds = %ehcleanup, %rethrow5, %catch.dispatch2
%17 = cleanuppad within %1 []
call void @__cxa_end_catch() [ "funclet"(token %17) ]
cleanupret from %17 unwind to caller
unreachable: ; preds = %rethrow5
unreachable
}
; Nested loop within a catch clause
; CHECK-LABEL: test2
; CHECK: call foo@FUNCTION
; CHECK: .LBB2_1:
; CHECK: i32.catch
; CHECK: i32.call $drop=, __cxa_begin_catch@FUNCTION
; CHECK: .LBB2_2:
; CHECK: call foo@FUNCTION
; CHECK: .LBB2_4:
; CHECK: catch_all
; CHECK: call __cxa_end_catch@FUNCTION
; CHECK: .LBB2_5:
; CHECK: i32.catch
; CHECK: call __clang_call_terminate@FUNCTION
; CHECK: unreachable
; CHECK: .LBB2_6:
; CHECK: catch_all
; CHECK: call _ZSt9terminatev@FUNCTION
; CHECK: unreachable
; CHECK: .LBB2_7:
; CHECK: rethrow
; CHECK: .LBB2_8:
; CHECK: call __cxa_end_catch@FUNCTION
; CHECK: .LBB2_10:
; CHECK: return
define void @test2() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
entry:
invoke void @foo()
to label %try.cont unwind label %catch.dispatch
catch.dispatch: ; preds = %entry
%0 = catchswitch within none [label %catch.start] unwind to caller
catch.start: ; preds = %catch.dispatch
%1 = catchpad within %0 [i8* null]
%2 = call i8* @llvm.wasm.get.exception(token %1)
%3 = call i32 @llvm.wasm.get.ehselector(token %1)
%4 = call i8* @__cxa_begin_catch(i8* %2) [ "funclet"(token %1) ]
br label %for.cond
for.cond: ; preds = %for.inc, %catch.start
%i.0 = phi i32 [ 0, %catch.start ], [ %inc, %for.inc ]
%cmp = icmp slt i32 %i.0, 50
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
invoke void @foo() [ "funclet"(token %1) ]
to label %for.inc unwind label %ehcleanup
for.inc: ; preds = %for.body
%inc = add nsw i32 %i.0, 1
br label %for.cond
for.end: ; preds = %for.cond
call void @__cxa_end_catch() [ "funclet"(token %1) ]
catchret from %1 to label %try.cont
try.cont: ; preds = %for.end, %entry
ret void
ehcleanup: ; preds = %for.body
%5 = cleanuppad within %1 []
invoke void @__cxa_end_catch() [ "funclet"(token %5) ]
to label %invoke.cont2 unwind label %terminate
invoke.cont2: ; preds = %ehcleanup
cleanupret from %5 unwind to caller
terminate: ; preds = %ehcleanup
%6 = cleanuppad within %5 []
%7 = call i8* @llvm.wasm.get.exception(token %6)
call void @__clang_call_terminate(i8* %7) [ "funclet"(token %6) ]
unreachable
}
declare void @foo()
declare void @bar()
declare i32 @__gxx_wasm_personality_v0(...)
declare i8* @llvm.wasm.get.exception(token)
declare i32 @llvm.wasm.get.ehselector(token)
declare i32 @llvm.eh.typeid.for(i8*)
declare i8* @__cxa_begin_catch(i8*)
declare void @__cxa_end_catch()
declare void @__cxa_rethrow()
declare void @__clang_call_terminate(i8*)
declare void @_ZSt9terminatev()
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